[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [List Home]
[eclipselink-users] Order of persist operations

Hi guys, 

I am experiencing a weird imho behaviour of Eclipselink and I'd really like to hear some other opinions . 

I have a pretty simple entity with assigned IDs; 

@Entity @Table(name="ROLE")
public class Role implements Serializable {

private static final long serialVersionUID = 1L;


@Id @Column(name="ID", length=20, nullable=false)
    public String id;

   

}


I am executing the following operations: 

public static void main(String[] args) {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("EclipseLinkJPATest");

EntityManager em = emf.createEntityManager();

em.getTransaction().begin();
for (int i = 0; i < 10; i++) {
Role r = new Role();
r.id = "TEST" + i;
em.persist(r);
}
em.getTransaction().commit();

em.close();
emf.close();
}

And I'd expect that the INSERT queries will be executed in the same order as the persist() method is called: 
TEST0, TEST1, TEST2 , etc.

But in the real life the insert queries are in a random order every time: 

EL Fine]: sql: 2013-01-17 12:13:58.11--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST1]
[EL Fine]: sql: 2013-01-17 12:13:58.113--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST6]
[EL Fine]: sql: 2013-01-17 12:13:58.114--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST2]
[EL Fine]: sql: 2013-01-17 12:13:58.115--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST7]
[EL Fine]: sql: 2013-01-17 12:13:58.117--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST4]
[EL Fine]: sql: 2013-01-17 12:13:58.121--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST8]
[EL Fine]: sql: 2013-01-17 12:13:58.123--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST3]
[EL Fine]: sql: 2013-01-17 12:13:58.124--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST9]
[EL Fine]: sql: 2013-01-17 12:13:58.126--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST5]
[EL Fine]: sql: 2013-01-17 12:13:58.127--ClientSession(1694665796)--Connection(1795160456)--INSERT INTO ROLE (ID) VALUES (?)
bind => [TEST0]

As you can see the order if insert queries is: 
TEST1, TEST6, TEST2, TEST7, TEST4, etc. 


That is really weird and wrong ! :) 
I dug a lot and could not find a solution. 

Please help :)

Thanks in advance,
Deyan